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7MF4433-1DA02-2DB6-Z

7MF4433-1DA02-2DB6-Z

发布时间:2019-02-21 11:29:53点击率:

所属行业:五金原材料-> 废金属-> 废镍
价格:¥1274
规格:7MF4433-1DA02-2DB6-Z
供货总量:1

7MF4433-1DA02-2DB6-Z

7MF4433-1DA02-2DB6-Z

7MF4433-1DA02-2DB6-Z

7MF4433-1DA02-2DB6-Z

7MF4433-1DA02-2DB6-Z

7MF4433-1DA02-2DB6-Z

电缆装置的夹紧力来自压紧元件对密封圈的挤压,使密封圈变形从而对电缆抱紧;所以为了确保隔爆电缆引入装置的密封性能,必须使密封圈对电缆产生足够的抱紧力,同时还需满足严苛的耐热耐寒测试。

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我们知道,通常情况下弹性密封圈是硫化橡胶制作而成;而硫化橡胶会受温度、湿度的影响加速老化,从而逐渐失去弹性,进而影响电缆的密封性能。所以橡胶的工作温度范围、抗老化、抗撕裂等特性都是我们设计时需要着重考虑的。

    

另,密封圈的变形是通过施加在压紧元件的力矩来实现的;所以扭力也是我们关注的一个重点。通常情况下,我们需要通过试验确定一个合理的小拧紧力矩,以保证电缆引入装置被正确可靠的安装和使用。


4.2隔爆型电缆引入装置密封圈夹紧力分析

    

当我们按照给定的力矩拧紧压紧元件时,压紧元件推动垫片给密封圈一个压力F;按照力学作用力与反作用力定律,密封圈也给垫圈一个大小相等、方向相反地反作用力F’。因密封圈具有弹性,根据压力与压强公式:F=PS(因接触面积S跟电缆直径成正比,电缆越粗接触面积越大;而压强P一定);所以电缆越粗,密封圈对电缆的抱紧力越大。

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联系方式
姓名:  欧工
部门:  销售部
职位:  销售
电话:  
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地址:  福建厦门市厦门市思明区嘉禾路293号宝达大厦1003室
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